Video processing method and video appliance implementing the method

a video processing and video appliance technology, applied in the field of video processing methods, can solve problems such as unsatisfactory solutions, stepped video output which could be annoying for users, and furthermore felt problems

Inactive Publication Date: 2015-01-15
ADVANCED DIGITAL BROADCAST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0016]It is therefore an object of the present invention to present a video processin

Problems solved by technology

In particular, such a problem is furthermore felt when the video appliance is required to support “trick modes”, i.e. playing (forward or reverse) of the video stream at different speeds.
Nevertheless, this solution has the drawback of a stepped video output which could be annoying for a user.
The solution proposed by U.S. 6,327,421 is not satisfact

Method used

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  • Video processing method and video appliance implementing the method
  • Video processing method and video appliance implementing the method
  • Video processing method and video appliance implementing the method

Examples

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Embodiment Construction

[0040]While the invention is susceptible of various modifications and alternative constructions, certain illustrated embodiments thereof have been shown in the drawings and will be described below in detail. It should be understood, however, that there is no intention to limit the invention to the specific form disclosed, but, on the contrary, the invention is to cover all modifications, alternative constructions, and equivalents falling within the spirit and scope of the invention as defined in the claims.

[0041]In the following description and in the figures, like elements are identified with like reference numerals. The use of “e.g.,”“etc.,” and “or” indicates non-exclusive alternatives without limitation unless otherwise noted. The use of “including” means “including, but not limited to,” unless otherwise noted.

[0042]FIG. 1 schematically illustrates a video appliance 100. For sake of clarity only most important functional blocks of the video appliance 100 are represented in FIG. ...

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PUM

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Abstract

It is disclosed a video processing method for generating a reverse video stream from an original video stream. Coded frames of the original video stream are buffered and decoded, whereby a reverse video stream is generated wherein the decoded frames are organized according to an order which is opposite to the display order of the original video stream. According to the method, a frame to be displayed is selected (602) between frames of the original video stream, selection of the frame being made based on the frames display order of the reverse video stream. The method further provides for checking (702-703) in a list of decoded frames if all reference frames of the original video stream necessary to decode the selected frame have already been decoded and the relative decoded frames are actually buffered.

Description

DESCRIPTION[0001]1. Technical Field[0002]The present invention relates to the field of video processing methods and in particular to video processing methods for reverse play (rewind) of a video stream. The invention has preferred application in video appliances, like set-top-boxes, with limited memory available for video processing.[0003]2. Background Art[0004]Digital video streams consist of a plurality of video frames that shall be displayed in sequence; the higher quality of the video streams, the greater the size, in bytes, of the corresponding stream.[0005]In order to reduce required transmission bandwidth or required storage space, it is well known to compress video streams according to different compression standards.[0006]MPEG video employs three different compression algorithms for compressing frames: I-frames, which do not need other frames to be decoded (intracoded frames), P-frames, which need one previous P-frame to be decoded (intercoded frames), and B-frames, which n...

Claims

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Application Information

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IPC IPC(8): G11B27/00G11B20/00
CPCG11B2020/00072G11B20/00007G11B27/005H04N5/783H04N9/8042H04N21/4325H04N21/44004
Inventor ZALEWSKI, MARCIN
Owner ADVANCED DIGITAL BROADCAST
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